.div1
{
    position: absolute;
    width:500px;
    height:200px;
    left: 500px;
    top: 100px;
    border: 1px solid;
}
.div3
{
    position: absolute;
    width:800px;
    height:600px;
    border: 1px solid;
}

.div3-1
{
    position: absolute;
    width:600px;
    height:200px;
    left: 100px;
    top:130px;
    border: 0px solid;
    text-align: center;
}

.button3-2
{
    left: 0px;
    top: 100px;
}

.button3-3
{
    left: 700px;
    top:100px;
}

.button3-4
{
    left: 0px;
    top: 400px;
}

.button3-5
{
    left: 700px;
    top:400px;
}

